[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988]
     Order Charadriformes see Order Charadriiformes Huxley, 1867
       Family Alcidae Vigors, 1825 - auks
         1 Genus Alca Linnaeus, 1758
         2 Genus Alle Link, 1806
         3 Genus Cepphus Pallas, 1769
         4 Genus Fratercula Brisson, 1760
         5 Genus Pinguinus Bonnaterre, 1791
         6 Genus Uria Brisson, 1760